/Engine/Source/Runtime/Engine/Classes/Kismet/BlueprintSetLibrary.h
Remove item from set. Output value indicates if something was actually removed. False indicates no equivalent item was found.
True if an item was removed (False indicates no equivalent item was present)
static bool Set_Remove ( const [TSet](API\Runtime\Core\Containers\TSet)< int32 > & TargetSet, const int32 & Item )